Visible light photocatalytic degradation and biological activities of Aegle marmelos-mediated cerium oxide nanoparticles

Abstract

This study investigated the antibacterial and photocatalytic properties of cerium oxide nanoparticles (CeO2 NPs), which were synthesized using Aegle marmelos extract. CeO2 NPs were characterized by different spectroscopy methods such as ultraviolet-visible spectroscopy, powder X-ray diffraction, and Fourier transform-infrared spectroscopy. The shape and elemental analysis of synthesized CeO2 NPs were evaluated using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. Further, the size and stability of the synthesized CeO2 NPs were characterized by ZETA potential and dynamic light scattering analysis. Further, the photocatalytic efficiency of synthesized NPs was verified by 98% of methylene blue dye degradation exhibited within 180 min at the visible region and the first-order kinetic value was 0.2038 min−1. The green synthesized CeO2 NPs were found to have significant antibacterial activity against bacterial organisms. The effective antibacterial activity of E. coli (30 ± 0.02), P. aeruginosa (30 ± 0.07), S. aureus (24 ± 0.04), and S. epidermis (29 ± 0.04) at 100 µg·mL−1. Therefore, Aegle marmelos CeO2 NPs were used as a photocatalytic and antimicrobial therapeutic agent. The synthesized CeO2 NPs also displayed enhanced anticancer efficacy with higher concentrations against MCF-7 cells. Thus, CeO2 NPs have antibacterial, anticancer, and photocatalytic properties, according to this study.

Keywords

• aegle marmelos extract
• dls analysis
• methylene blue
• visible light
• antibacterial activity